【单选题】Enclosed you______an application form. that you are asked to fill out.
【单选题】一般情况下,应尽量避免以下服饰色彩的搭配 ( )
【单选题】You must complete the enclosed form. and return it within 30 days of purchase_______you may activate the one-year replacement guarantee.
【多选题】颁布《工伤保险条例》对于我国工伤保险制度改革的重要意义,主要体现在以下哪些方面( )。
【单选题】已知n阶可逆矩阵A的特征值为λ0,则矩阵(2A)-1的特征值是( )
【单选题】想要深入了解教师反思情况及原因,应当采用_____研究方法
【单选题】There is danger of toxic gases in enclosed spaces.So you must always check the air before you enter
A.
It is dangerous to enter enclosed spaces without checking the air
B.
It is dangerous to enter enclosed spaces while checking the air
C.
It is dangerous to check the air in enclosed spaces
D.
It is dangerous to check the toxic gases in enclosed spaces
【简答题】已知三阶矩阵A的特征值为-1,1,2,则矩阵B=(A+)-1(其中A*为A的伴随矩阵)的特征值为( )。